2b means that the pencil will be 1/6th inch longer than the original size at its end. This adds a bit o o 5/8 – 1/16 inch to the pencil which makes it about 3-1/2 inches longer than its original length – (not a significant increase). It should never be larger than the original size!
Why aren’t 2b sheets used with 2c? 2B and 2C sheets are the same thickness. So why two different thicknesses for 2B and 2C sheets?
It is important for me to explain the difference between 2B and 2C sheets. 2B sheets are thin sheets. They are made from 1/6th inch thick polyethylene. They are the same weight as 2C sheets that are 1/8th inch thick and weigh about 2lbs for 2B. The 2B sheet has the same thickness as 2C sheets that are 1/4th inch thick. The 2B sheets are used when you want to make a thin 1/6th inch thick sheet on the end of a tube. They are usually used where you need a thick 1/4th inch thick sheet but don’t want to make it too thick to write with or to make it too long on a ruler. It can be very handy for a very narrow area. It can also be used to make thin 1/8th inch thick sheets for a narrower or thicker area than 2C sheets. They are easy to move around as you take it apart from other sheets without the need to break all the sheets apart.
2c sheets are thick sheets made from 1/4th inch thick polyethylene that have been turned over and over again to make a uniform thickness. They are the same weight as 2B sheets but weigh slightly more. They’re the easiest to work with. They are perfect for making thin 1/4th inch thick sheets. It adds just a mm/3/16 of an inch to a sheet. It adds exactly 1/16 th to a sheet of 2B (which is 3/32 inch). So making a 1/4 x 2B sheet is about 10% bigger than making a sheet of 2B. When you have a 1/4th inch thick sheet on the end of a tube, you simply place it on a tape sander to flatten out a slightly thicker 1/4th inch sheet on the end of a tube. You then use the 1/4th inch sheet of 2B,
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